1) Make that quest itemsare dropped just one time. When i'm hunting, i have to discard a lot of quest items even when i finished that quest, and that's annoying.
2) Improve the filters for AH. There isn't a way to filter out the components, which makes much more extensive the search for a specific type of object.
3) Queue option to composing potions
4) How about a monster filter? Or something that helps to avoid some kind of creatures? By lvl, type, or even drop, even better if you want to enable some kind of "database" about different monsters drop. Is just a concept